Police are looking for the public's help in tracking down graffiti artists who target buildings in Calgary, including this example that says Cas. (CBC)

Police in Calgary are looking for the public's help as they try to track down several graffiti painters who have routinely targeted buildings in the city.

Officials released photos of some of the most prolific offenders' "tags", which are akin to a graffiti artist's signature, officials said. The "tags" police are most interested in tracing are:

Cas

Akor

Gowr

Phere

Bayse

Police released photos of several examples of graffiti that investigators are trying to trace to their authors. (CBC)Graffiti on public property is costly for the city to remove and for police to investigate, officials said in a release.

Anyone who sees graffiti vandalism in progress should call 911, while existing graffiti vandalism can be reported by calling 311, police said.